AKA override function
AKA 245 contains a function capable of reading values from a given function in a given controller on
Data communication. The gateway will treat the information and then set the values in other selected
controllers in the system. Each individual controller will subsequently carry out the given function. You
can max. download data from 100 controllers. Otherwise the data communication will be overloaded.
The functions are also described in the document ”Overriding, RI8AL-”.
At the moment the following functions can be arranged:
AKC ON signal
This function is used for stopping the regulation (closing the valve) in all controllers regulating a refrig-
eration appliance when all belonging compressors are stopped.
Example: When the compressor is stopped, the compressor control sends a signal via data communica-
tion. The master gateway subsequently sends this signal on to the defi ned controllers which will then
close the valve.
Displacement of alarm limit
This function is used for raising the alarm limit during a period where the compressor control is unable
to cut in more capacity.
Example: On an extremely hot summer day where the outdoor tempera ture exceeds a set value, the
control will generate an off set signal that will depend on a signal from a room sensor. The off set signal
will then be retransmitted to the defi ned controllers which will raise the limit of the high-temperature
alarm.
Defrost control
The function can transmit signal concerning defrost start to the diff erent refrigeration points.
All defi ned controllers will follow the signal. When defrost has started it is up to the individual control-
lers how it is to be stopped again. Some are based on time, others on temperature. The defrost is started
by a week-based one-year clock in the gateway.
Day/night function
The function can send signals about night operation to the diff erent refrigeration points. All the defi ned
controllers will follow the signal. The signal is generated by a week-based one-year clock in the gateway
or from a digital signal on a controller.
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Manual RS8DT102 © Danfoss 09/2004
AKA
245